Continuous heating-furnace.



PATENTED' APR, 21, 1903. A. LAUGHLIN a J. REULBAUX.

CONTINUOUS HEATING FURNACE.

APPLICATION II LED JAN. 12, 1903 4'SHEETS-SHEET 41.

no MODEL.

Law 1069 n, max

A T T Y No. 726,173. "PATENTED APR, 21,1903; A. LAUGHLIN & LREULEAUX.CONTINUOUS HEATING FURNACE.

APPLICATION FILED JAN. 12, 1903.

N0 MODEL.

4 SHEETS-SHEET 2.

WITNESSES: mvEnrromS No. 726,173. PATENTED APR, 2-1, 1903.

* A. LAUGHLIN & J. REULEAUX. 4

CONTINUOUS HEATING FURNACE.

' APPLICATION FILED JAN. 12 ,1903. N0 MODEL. 4 SHEETS-$11331 s.-

h I 1 mvcmons .WITNESSES I Alexwmpjf 1 ,6571, WW (10 ef' fieaeqvocxATTY.

THE-hams wnzas co, wrmxumou WASHINGTON. n. c.

' g PATEN'IED APR, 1903. A. LAUGHLIN & J. REULEAUX.

CONTINUOUS HEATINGIURNACE.

APPLICATION FILED JAN.-"12.'190s.

no MODEL. 4 SHEETS-SHEET 4.

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UNITED PATENT OFFICE.

ALEXANDER LAUGHLlN, or SEWICKLEY, AND JOSEF REULEAUX, OF WILKINSBURG,PENNSYLVANIA; VSA'ID REULEAUX ASSIGNOR T0 SAID LAUGHLIN.

comm U.Q.U sflH EAT-I NG -FU RTNACE.

SPECIFICATION rom ngi tm of Letters Pa e No. mama-dated April 21, 1903.Application filed January 12 19 03. SerialITO-138,759- (Ndmodeh) To allwhom it may concern:

Be it known that we, ALEXANDER L UGH LIN, of Sewickley, and J OSEFREULEAUX, of Wilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inContinuous Heating-Furnaces; and we doherebydeclare for effecting theautomatic "discharge of blooms, billets, or other material over or fromI the point of highest heat within the furnace, l the materials beingmoved beyond such point 1 independently of the means by which they weremoved toit. 'Upon their'discharge the materials fall upon a con'veyerextended transversely of the furnace at the end thereof.

The objects of the present improvements are, first, to so adapt suchautomatic disl charge feature to a coal or solid-fuel furnace; thataccess may be readily had to the fire-bed 1 and ash-pit of an extra-Widefurnace without 1 interfering with the conveyer onto which the materialis discharged; secondly, to so con-' Beet the air-blast and the chill inthe fur-. pace-breast that air will be forced both into the fire-box andthrough the chill and may be heated before entering the former, and,finally, ,to improve the construction and promote the efficiency ofcoal-fired furnaces employing means for automatically discharging thematerial directly over the fire-bed.

The inventio'n'will be hereinafter fully set :forth, and particularlypointed out in the claims. I,

In the accompanying 'drawings,"Figure 1 is a vertical longitudinalsectional view. Fig. 2 is a horizontal sectional view. Figs. 3, 4, and 5are vertical cross-sectional views on lines B B, O O, and D D,respectively, Fig.

I 1. Fig. 6 is a vertical longitudinal sectional view showing awater-seal ash-pit and the air -blast'con'nected first to the chill inthe furnace-breast. Figs. 7, R, and 9 are respec- K K, and L L, Fig. 6.

As pointed out in the patents hereinbefore noted, the blooms, billets,or other material to be heated are introduced in the furnace at one endand mechanically pushed therethr'oug'li over supports extendinglongitudinally'of theheating-chamber, and upon reaching the point ofhighest heat such material is automatically discharged by gravity overinclined supportspand passing out the discharge-opening'fall upon aconveyer.

In the several figures of the drawings, 1 designates the supports; 2,the inclined portions thereof; 3, the conveyer, and 4 the pusher wherebythe material is pushed along the supports up to the point at which thedischarge thereof is automatically effected.

. in the several forms shown in the drawings we have'provid'ed-coal orsolid-fuel combustion-chambersover which the material is antomaticallydischarged. We have found in actual practicethat in a very wide furnacebuilt to accommodate long material it is impossible to'clean the firesfrom the end of the furnace. because of the presence of the conlveyerand that it cannot be done from the sides of the furnace, owing to thegreat distance to be reached in order to get to the middle of thefire-bed. To overcome these difficulties in wide furnaces, we constructa cleaning-pit 6 directly under the body of the furnace, and in theinner or breast wall 7 we form door-covered openings 8, so that thegrate-bars may be operated to shake down the ashes or the fire bed orbeds be otherwise worked. The space beingnecessarily contracted,provision is madejforremoving the ashes from the end of the furnace bythe formation of door-covered openings 9 in the end wall 10, accessbeing thus had to the ash-pit at points beneath theconveyenthe-latter inno way interfering with access to the former. Thus the attendant isenabled to clean the fires through the upper set of doors in the inneror breast wall of the furnace and to retively vertical sectional viewson lines J J,

move the ashes through the lower setof doors in the outer wall beneaththe conveyer.

In wide furnaces, such as we have described, it is preferable to dividethe fire bed or chamber and ash-pit by a central partition 12, (see Fig.4,) and we have found it advantageous to incline or taper the furnaceside walls and partitions, as at 13, so that the ashes will be directedtoward the center of each pit, from which they maybe readily removedthrough comparatively narrow dooropenings.

In Figs. 6, 7, and 8 we have shown the ashpits with water sealedopenings, through which the ashes may be removed from the lower orsupplemental pit 14, containing the water.

Extending transversely through the furnace breast-wall 7 is a chamber orpassageway forming a chill 15, the purpose of which is to preserve thewall by the presence or circulation of cold air. Air is also introducedinto the fire-chambers beneath the grates through openings 16. In Figs.1, 4, and 5 we have shown the air blast 17 as extended through thepartition 12 and opening first into the fire-chambers through theopenings 16 and thence into the chill, so that air will be supplied bothto the fire-chambers and the chill directly from the blast; but in someinstances it is preferable to reverse this arrangement and supply theair first to the chill and thence to the fire-chambers, with the resultthat the chill is cooled and the air is warmed before entering thefire-chambers. This arrangement is shown in Figs. 6 and 9, theblast-pipe being 18 and the chill 19. A suitable connection 20 connectsthe chill to the openings 16, leading into the divided firechamber. (SeeFig. 9.)

The opening'21 in the end wall 10, through which the material isautomatically discharged, is of uniform height throughout its width (seeFig. 8) and is supported by a casting 22, which casting is water-cooledby the circulation of water through the pipes or tubular openings 23.When this discharge-opening is formed of brick, as heretofore, it has tobe arched, and hence made very much higher at the middle of the furnacethan at the sides; but by the employment of the water-cooled castingthis opening may be of uniform height throughout its width, and thecasting need be only suificiently above the inclined supports to allowthe material to pass freely out onto the conveyer.

As hereinbefore stated, the material to be heated is mechanically pushedforward over the longitudinally-extended supports up to the point atwhich it reaches the fire-chamber, whereupon as soon as it is directlyabove the fire-beds the blooms, billets, rails, or other materials willone at a time be automatically discharged over such bed and pass outonto the conveyer. Thus the materials are brought into close relationwith the fire-beds while being discharged from the furnace.

By arranging the cleaning-pit beneath the body of the furnace anoperator is enabled to work the fire-beds at every point regardless ofthe width of the furnace, and by locating the ash-pit openings in theend wall of the furnacethat is, in the Wall opposite to that in whichthe other openings are formedwe are enabled to secure ina furnace of thecharacter herein described all of the advantages of the automaticdischarge and conveyer, as set forth in the before-noted patents.

\Ve claim as our invention 1. Acontinuous heating-furnace having, incombination, a discharge-opening at or near the rear end of the furnace,a fire-chamber within the furnace adjacent to such opening, saidfire-chamber opening directly into the heating-chamber, supports for thematerials being heated extending from the front end of the furnace overthe fire-chamber to the said discharge-opening, and a cleaning-pitbeneath the heating-chamber in rear of the inner wall of thefire-chamber, such fire-chamber having openings in said inner wall abouton line with the fire-bed, and also having ashremoval openings in itsend wall, as set forth.

2. A continuous heating-furnace having, in combination, adischarge-opening at or near the rear end of the furnace, a fire-chamberwithin the furnace adjacent to such opening, said fire-chamber openingdirectly into the heating-chamber, supports for the materials beingheated extending from the front end of the furnace over the fire-chamberand to the said discharge-opening, a conveyor outside the furnace forreceiving the materials as they leave the latter, and a cleaning-pitbeneath the heating-chamber in rear of the inner wall of thefire-chamber, such fire-chamber having openings in said inner wall abouton line with the fire-bed, and also having ashremoval openings in itsend wall beneath said conveyer, as set forth.

3. A continuous heating-furnace having, in combination, adischarge-opening at or near the rear end of the furnace, a fire-chamberwithin the furnace adjacent to such opening, said fire-chamber openingdirectly into the heating-chamber, ash-pits beneath the firechambers,supports for the materials being heated extending from the front end ofthe furnace over the fire-chamber and to the said discharge-opening, aconveyer outside the furnace for receiving the materials as they leavethe latter, a cleaning-pit beneath the heating-chamber in rear of theinner wall of the fire-chamber, such fire-chamber having openings insaid inner wall about on line with the fire-bed, and also havingash-removal openings in its end wall beneath said conveyer, and acentral partition within said firechamber, the opposite faces of suchpartition and the side walls of the fire-chamber being inclined towardthe centers of the ash-pits, as set forth.

4:. Acontinuous heating-furnace having, in combination, adischarge-opening at or near the rear end of the furnace; a fire-chamberWithin the furnace having a breast-wall, an air-blast, a centralpartition Within such fireohamber, said partition having air-openingsleading into each partof the divided firechamber, a chill within suchbreast-wall in communication with the air-blast, the latter supplyingair to both the chill and the-firechamber, supports for the materialbeing heated extending from the front end of the viding the firewhamber,having air-openings leading into each part of the divided firechamber, aconnection between the chill and said air-openings, an air-blast openinginto the chill, supports'for the material being heated extending fromthe front end of the furnace over said fire-chamber and to the saiddischarge opening, the supports being inclined over saidfire-chambeneand means for pushing the materials along the supports upto the fire-chamber, such materials being automatically discharged oversuch fire-chant her, as set forth. r

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

ALEXANDER LAUGHLIN. J OSEF REULEAUX.

Witnesses:

THOMAS BUCKLEY, NEWMAN GROVES.

